Which is the current version?
How can I update my system? If the number of your version differs only after the decimal point (e.g. R354.40) then you can use the update manager (file <updatemanager.exe in the system folder of the software) to bring your KELLER
KELLERplus Update 56 Downloads
old version in advance. Also an installation via update manager from an existing V6.0 installation will not work ... SYMplus™ Update 56 Released on 28.05.2019 Please note that the software can only be run with a valid license
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